Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Quais são as conexões de trânsito a partir de Pioneer Square U?
 ###Tabelas: CREATE TABLE stations (stations_id AUTO_INCREMENT PRIMARY KEY, Station VARCHAR, Line(s) VARCHAR, City/Neighborhood VARCHAR, Year opened INT, Transit Connections VARCHAR, Park and ride? VARCHAR) CREATE TABLE passenger_statistics (passenger_statistics_id AUTO_INCREMENT PRIMARY KEY, Rank INT, Airport VARCHAR, City VARCHAR, Code (IATA/ICAO) VARCHAR, 2008 INT, 2009 INT, 2010 INT) CREATE TABLE 75_million_to_79_million_records (75_million_to_79_million_records_id AUTO_INCREMENT PRIMARY KEY, Artist VARCHAR, Country of origin VARCHAR, Period active VARCHAR, Release-year of first charted record INT, Genre VARCHAR, Claimed sales VARCHAR) CREATE TABLE polling (polling_id AUTO_INCREMENT PRIMARY KEY, Party VARCHAR, Results 2004 VARCHAR, CSA 5/28/09 VARCHAR, Ifop 5/30/09 VARCHAR, Ipsos 5/30/09 VARCHAR, BVA 6/1/09 VARCHAR, TNS-Sofres 6/2/09 VARCHAR, OpinionWay 6/3/09 VARCHAR, Ipsos 6/3/09 VARCHAR, TNS-Sofres 6/4/09 VARCHAR, CSA 6/4/09 VARCHAR, Ifop 6/4/09 VARCHAR) CREATE TABLE general_election_results (general_election_results_id AUTO_INCREMENT PRIMARY KEY, Election VARCHAR, Dáil VARCHAR, Share of votes VARCHAR, Seats INT, Government VARCHAR)  
SELECT Transit Connections FROM stations WHERE Station = Pioneer Square U